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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The human body produces and destroys 15 million blood cells every second.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.